# How do I remove imperfections caused by the subdivision surfaces modifier?

I have run into imperfections with the mesh using the subdivision surfaces modifier before, but they were usually caused by either doubles or edges that penetrate the mesh. I tried removing doubles at a merge distance of 0.010, I tried degenerate dissolve and limited dissolve ruined my mesh. I also tried the recalculate outside method. I've looked around online, but other people's imperfections were caused by things I had already tried to solve, which weren't the causes of my mesh's imperfections.

How do I remove the imperfections near the eyes, including the creases and darker areas?

So everyone can try things out and see if their solution solves the problem, here is a link to the file I'm using:

http://www.filedropper.com/ambiguoussave11

Thank you very much for any help. :)

Knowing your problems may one day be resolved, it fills you with determination.

• To correctly remove them search the topic "face topology" and adjust your mesh accordingly. Oct 25, 2016 at 13:21

You can find all n-gons in your mesh by selecting a quad, pressing Shift+G, choosing Polygon Sides and changing the Compare setting to Greater. Keep in mind that the first quad is still selected.
In order to create quads from n-gons, split them using the knife tool (K). You can combine triangles by pressing X and coosing Dissolve Edges.